A Tale of Two Light Bulbs Incandescent or Fluorescent?? You will be faced with an energy quiz almost everyday for the rest of your life. This tale is an example of one of the choices you’ll be asked to make. What kind of light bulb should I buy?
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You will be faced with an energy quiz almost everyday for the rest of your life. This tale is an example of one of the choices you’ll be asked to make.
What kind of light bulb should I buy?
The story behind them represents the dilemma faced by renewable and efficiency proponents in today’s marketplace.
It’s what we use to light our houses.
This light produces 1,690 lumens of light.
On this side we have a 23 watt compact fluorescent bulb.
It is similar to the tubular fluorescents in most classrooms, but it kind of “twisted” into a smaller package and it screws into a standard socket.
This light bulb produces 1500 lumens of light.Incandescent or Fluorescent?
Incandescent or Fluorescent?
So what exactly is the difference between these bulbs?
How could a 100W incandescent bulb produce about the same amount of lumens as a 23W fluorescent?
come in sizes like “60 watt,” “75 watt,” “100 watt”
Electricity runs through the filament, since the filament is so thin it offers a good bit of resistance to the electricity.
This resistance then turns electrical energy into heat.
The heat is enough to make the filament white hot and the “white” part is light.
The filament literally incandesces because of the heat.
Heat is not light and the purpose of the light bulb is light, 90% of the energy is spent creating heat.Incandescent…
A stream of electrons flows through the gas from one electrode to the other.
These electrons bump into the mercury atoms and excite them.
As the mercury atoms move from the excited state back to the unexcited state, they give off ultraviolet photons.
These photons hit the phosphor coating inside of the fluorescent tube, and the phosphor creates visible light.
The phosphor fluoresces to produce light.
A fluorescent bulb produces much less heat, so it is much more efficient.
Fluorescent bulbs are 4 to 6 times more efficient than incandescent bulbs.Fluorescent…
Changing your light bulbs to fluorescent bulbs is the same concept.
How? – Well let’s do the math.